What is the percentage of sulfur used in vulcanized rubber for battery casings (in $\%$)?

What are oxidising agents? State two oxidising agents. Write one chemical equation using an oxidising agent.

Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms,e.g. hydrogen. After the formation of four bonds,carbon attains the electronic configuration of

Identify and name the functional groups present in the following compounds.
$(a)$ $CH_3-CO-CH_2-CH_3$
$(b)$ $CH_3-CH_2-CH=CH_2$

Which of the following is a homopolymer?

The general formula of three compounds $A, B$ and $C$ is $C_{n}H_{2n}$. $B$ has the highest boiling point and $C$ has the lowest boiling point.
$(i)$ Mention the type of compound $A, B$ and $C$.
$(ii)$ Which of these has the minimum number of carbon atoms?
$(iii)$ Name the homologous series to which $A, B$ and $C$ belong.